/* $NetBSD: pcap-dlpi.c,v 1.8 2024/09/02 15:33:37 christos Exp $ */
/*
* Copyright (c) 1993, 1994, 1995, 1996, 1997
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*
* This code contributed by Atanu Ghosh (
[email protected]),
* University College London, and subsequently modified by
* Guy Harris (
[email protected]), Mark Pizzolato
* <
[email protected]>,
* Mark C. Brown (
[email protected]), and Sagun Shakya <
[email protected]>.
*/
/*
* Packet capture routine for DLPI under SunOS 5, HP-UX 9/10/11, and AIX.
*
* Notes:
*
* - The DLIOCRAW ioctl() is specific to SunOS.
*
* - There is a bug in bufmod(7) such that setting the snapshot
* length results in data being left of the front of the packet.
*
* - It might be desirable to use pfmod(7) to filter packets in the
* kernel when possible.
*
* - An older version of the HP-UX DLPI Programmer's Guide, which
* I think was advertised as the 10.20 version, used to be available
* at
*
*
http://docs.hp.com/hpux/onlinedocs/B2355-90093/B2355-90093.html
*
* but is no longer available; it can still be found at
*
*
http://h21007.www2.hp.com/dspp/files/unprotected/Drivers/Docs/Refs/B2355-90093.pdf
*
* in PDF form.
*
* - The HP-UX 10.x, 11.0, and 11i v1.6 version of the HP-UX DLPI
* Programmer's Guide, which I think was once advertised as the
* 11.00 version is available at
*
*
http://docs.hp.com/en/B2355-90139/index.html
*
* - The HP-UX 11i v2 version of the HP-UX DLPI Programmer's Guide
* is available at
*
*
http://docs.hp.com/en/B2355-90871/index.html
*
* - All of the HP documents describe raw-mode services, which are
* what we use if DL_HP_RAWDLS is defined. XXX - we use __hpux
* in some places to test for HP-UX, but use DL_HP_RAWDLS in
* other places; do we support any versions of HP-UX without
* DL_HP_RAWDLS?
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: pcap-dlpi.c,v 1.8 2024/09/02 15:33:37 christos Exp $");
#include <config.h>
#include <sys/types.h>
#include <sys/time.h>
#ifdef HAVE_SYS_BUFMOD_H
#include <sys/bufmod.h>
#endif
#include <sys/dlpi.h>
#ifdef HAVE_SYS_DLPI_EXT_H
#include <sys/dlpi_ext.h>
#endif
#ifdef HAVE_HPUX9
#include <sys/socket.h>
#endif
#ifdef DL_HP_PPA_REQ
#include <sys/stat.h>
#endif
#include <sys/stream.h>
#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
#include <sys/systeminfo.h>
#endif
#ifdef HAVE_HPUX9
#include <net/if.h>
#endif
#ifdef HAVE_HPUX9
#include <nlist.h>
#endif
#include <errno.h>
#include <fcntl.h>
#include <memory.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stropts.h>
#include <unistd.h>
#include <limits.h>
#include "pcap-int.h"
#include "dlpisubs.h"
#ifdef HAVE_OS_PROTO_H
#include "os-proto.h"
#endif
#if defined(__hpux)
/*
* HP-UX has a /dev/dlpi device; you open it and set the PPA of the actual
* network device you want.
*/
#define HAVE_DEV_DLPI
#elif defined(_AIX)
/*
* AIX has a /dev/dlpi directory, with devices named after the interfaces
* underneath it.
*/
#define PCAP_DEV_PREFIX "/dev/dlpi"
#elif defined(HAVE_SOLARIS)
/*
* Solaris has devices named after the interfaces underneath /dev.
*/
#define PCAP_DEV_PREFIX "/dev"
#endif
#define MAXDLBUF 8192
/* Forwards */
static char *split_dname(char *, u_int *, char *);
static int dl_doattach(int, int, char *);
#ifdef DL_HP_RAWDLS
static int dl_dohpuxbind(int, char *);
#endif
static int dlpromiscon(pcap_t *, bpf_u_int32);
static int dlbindreq(int, bpf_u_int32, char *);
static int dlbindack(int, char *, char *, int *);
static int dlokack(int, const char *, char *, char *, int *);
static int dlinforeq(int, char *);
static int dlinfoack(int, char *, char *);
#ifdef HAVE_DL_PASSIVE_REQ_T
static void dlpassive(int, char *);
#endif
#ifdef DL_HP_RAWDLS
static int dlrawdatareq(int, const u_char *, int);
#endif
static int recv_ack(int, int, const char *, char *, char *, int *);
static char *dlstrerror(char *, size_t, bpf_u_int32);
static char *dlprim(char *, size_t, bpf_u_int32);
#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
#define GET_RELEASE_BUFSIZE 32
static void get_release(char *, size_t, bpf_u_int32 *, bpf_u_int32 *,
bpf_u_int32 *);
#endif
static int send_request(int, char *, int, char *, char *);
#ifdef HAVE_HPUX9
static int dlpi_kread(int, off_t, void *, u_int, char *);
#endif
#ifdef HAVE_DEV_DLPI
static int get_dlpi_ppa(int, const char *, u_int, u_int *, char *);
#endif
/*
* Cast a buffer to "union DL_primitives" without provoking warnings
* from the compiler.
*/
#define MAKE_DL_PRIMITIVES(ptr) ((union DL_primitives *)(void *)(ptr))
static int
pcap_read_dlpi(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
{
int cc;
u_char *bp;
int flags;
bpf_u_int32 ctlbuf[MAXDLBUF];
struct strbuf ctl = {
MAXDLBUF,
0,
(char *)ctlbuf
};
struct strbuf data;
flags = 0;
cc = p->cc;
if (cc == 0) {
data.buf = (char *)p->buffer + p->offset;
data.maxlen = p->bufsize;
data.len = 0;
do {
/*
* Has "pcap_breakloop()" been called?
*/
if (p->break_loop) {
/*
* Yes - clear the flag that indicates
* that it has, and return -2 to
* indicate that we were told to
* break out of the loop.
*/
p->break_loop = 0;
return (-2);
}
/*
* XXX - check for the DLPI primitive, which
* would be DL_HP_RAWDATA_IND on HP-UX
* if we're in raw mode?
*/
ctl.buf = (char *)ctlbuf;
ctl.maxlen = MAXDLBUF;
ctl.len = 0;
if (getmsg(p->fd, &ctl, &data, &flags) < 0) {
/* Don't choke when we get ptraced */
switch (errno) {
case EINTR:
cc = 0;
continue;
case EAGAIN:
return (0);
}
pcapint_fmt_errmsg_for_errno(p->errbuf,
sizeof(p->errbuf), errno, "getmsg");
return (-1);
}
cc = data.len;
} while (cc == 0);
bp = (u_char *)p->buffer + p->offset;
} else
bp = p->bp;
return (pcap_process_pkts(p, callback, user, cnt, bp, cc));
}
static int
pcap_inject_dlpi(pcap_t *p, const void *buf, int size)
{
#ifdef DL_HP_RAWDLS
struct pcap_dlpi *pd = p->priv;
#endif
int ret;
#if defined(DLIOCRAW)
ret = write(p->fd, buf, size);
if (ret == -1) {
pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "send");
return (-1);
}
#elif defined(DL_HP_RAWDLS)
if (pd->send_fd < 0) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"send: Output FD couldn't be opened");
return (-1);
}
ret = dlrawdatareq(pd->send_fd, buf, size);
if (ret == -1) {
pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "send");
return (-1);
}
/*
* putmsg() returns either 0 or -1; it doesn't indicate how
* many bytes were written (presumably they were all written
* or none of them were written). OpenBSD's pcap_inject()
* returns the number of bytes written, so, for API compatibility,
* we return the number of bytes we were told to write.
*/
ret = size;
#else /* no raw mode */
/*
* XXX - this is a pain, because you might have to extract
* the address from the packet and use it in a DL_UNITDATA_REQ
* request. That would be dependent on the link-layer type.
*
* I also don't know what SAP you'd have to bind the descriptor
* to, or whether you'd need separate "receive" and "send" FDs,
* nor do I know whether you'd need different bindings for
* D/I/X Ethernet and 802.3, or for {FDDI,Token Ring} plus
* 802.2 and {FDDI,Token Ring} plus 802.2 plus SNAP.
*
* So, for now, we just return a "you can't send" indication,
* and leave it up to somebody with a DLPI-based system lacking
* both DLIOCRAW and DL_HP_RAWDLS to supply code to implement
* packet transmission on that system. If they do, they should
* send it to us - but should not send us code that assumes
* Ethernet; if the code doesn't work on non-Ethernet interfaces,
* it should check "p->linktype" and reject the send request if
* it's anything other than DLT_EN10MB.
*/
pcapint_strlcpy(p->errbuf, "send: Not supported on this version of this OS",
PCAP_ERRBUF_SIZE);
ret = -1;
#endif /* raw mode */
return (ret);
}
#ifndef DL_IPATM
#define DL_IPATM 0x12 /* ATM Classical IP interface */
#endif
#ifdef HAVE_SOLARIS
/*
* For SunATM.
*/
#ifndef A_GET_UNITS
#define A_GET_UNITS (('A'<<8)|118)
#endif /* A_GET_UNITS */
#ifndef A_PROMISCON_REQ
#define A_PROMISCON_REQ (('A'<<8)|121)
#endif /* A_PROMISCON_REQ */
#endif /* HAVE_SOLARIS */
static void
pcap_cleanup_dlpi(pcap_t *p)
{
#ifdef DL_HP_RAWDLS
struct pcap_dlpi *pd = p->priv;
if (pd->send_fd >= 0) {
close(pd->send_fd);
pd->send_fd = -1;
}
#endif
pcapint_cleanup_live_common(p);
}
static int
open_dlpi_device(const char *name, u_int *ppa, char *errbuf)
{
int status;
char dname[100];
char *cp;
int fd;
#ifdef HAVE_DEV_DLPI
u_int unit;
#else
char dname2[100];
#endif
#ifdef HAVE_DEV_DLPI
/*
** Remove any "/dev/" on the front of the device.
*/
cp = strrchr(name, '/');
if (cp == NULL)
pcapint_strlcpy(dname, name, sizeof(dname));
else
pcapint_strlcpy(dname, cp + 1, sizeof(dname));
/*
* Split the device name into a device type name and a unit number;
* chop off the unit number, so "dname" is just a device type name.
*/
cp = split_dname(dname, &unit, errbuf);
if (cp == NULL) {
/*
* split_dname() has filled in the error message.
*/
return (PCAP_ERROR_NO_SUCH_DEVICE);
}
*cp = '\0';
/*
* Use "/dev/dlpi" as the device.
*
* XXX - HP's DLPI Programmer's Guide for HP-UX 11.00 says that
* the "dl_mjr_num" field is for the "major number of interface
* driver"; that's the major of "/dev/dlpi" on the system on
* which I tried this, but there may be DLPI devices that
* use a different driver, in which case we may need to
* search "/dev" for the appropriate device with that major
* device number, rather than hardwiring "/dev/dlpi".
*/
cp = "/dev/dlpi";
if ((fd = open(cp, O_RDWR)) < 0) {
if (errno == EPERM || errno == EACCES) {
status = PCAP_ERROR_PERM_DENIED;
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"Attempt to open %s failed with %s - root privilege may be required",
cp, (errno == EPERM) ? "EPERM" : "EACCES");
} else {
status = PCAP_ERROR;
pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "Attempt to open %s failed", cp);
}
return (status);
}
/*
* Get a table of all PPAs for that device, and search that
* table for the specified device type name and unit number.
*/
status = get_dlpi_ppa(fd, dname, unit, ppa, errbuf);
if (status < 0) {
close(fd);
return (status);
}
#else
/*
* If the device name begins with "/", assume it begins with
* the pathname of the directory containing the device to open;
* otherwise, concatenate the device directory name and the
* device name.
*/
if (*name == '/')
pcapint_strlcpy(dname, name, sizeof(dname));
else
snprintf(dname, sizeof(dname), "%s/%s", PCAP_DEV_PREFIX,
name);
/*
* Get the unit number, and a pointer to the end of the device
* type name.
*/
cp = split_dname(dname, ppa, errbuf);
if (cp == NULL) {
/*
* split_dname() has filled in the error message.
*/
return (PCAP_ERROR_NO_SUCH_DEVICE);
}
/*
* Make a copy of the device pathname, and then remove the unit
* number from the device pathname.
*/
pcapint_strlcpy(dname2, dname, sizeof(dname));
*cp = '\0';
/* Try device without unit number */
if ((fd = open(dname, O_RDWR)) < 0) {
if (errno != ENOENT) {
if (errno == EPERM || errno == EACCES) {
status = PCAP_ERROR_PERM_DENIED;
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"Attempt to open %s failed with %s - root privilege may be required",
dname,
(errno == EPERM) ? "EPERM" : "EACCES");
} else {
status = PCAP_ERROR;
pcapint_fmt_errmsg_for_errno(errbuf,
PCAP_ERRBUF_SIZE, errno,
"Attempt to open %s failed", dname);
}
return (status);
}
/* Try again with unit number */
if ((fd = open(dname2, O_RDWR)) < 0) {
if (errno == ENOENT) {
status = PCAP_ERROR_NO_SUCH_DEVICE;
/*
* We provide an error message even
* for this error, for diagnostic
* purposes (so that, for example,
* the app can show the message if the
* user requests it).
*
* In it, we just report "No DLPI device
* found" with the device name, so people
* don't get confused and think, for example,
* that if they can't capture on "lo0"
* on Solaris prior to Solaris 11 the fix
* is to change libpcap (or the application
* that uses it) to look for something other
* than "/dev/lo0", as the fix is to use
* Solaris 11 or some operating system
* other than Solaris - you just *can't*
* capture on a loopback interface
* on Solaris prior to Solaris 11, the lack
* of a DLPI device for the loopback
* interface is just a symptom of that
* inability.
*/
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"%s: No DLPI device found", name);
} else {
if (errno == EPERM || errno == EACCES) {
status = PCAP_ERROR_PERM_DENIED;
snprintf(errbuf, PCAP_ERRBUF_SIZE,
"Attempt to open %s failed with %s - root privilege may be required",
dname2,
(errno == EPERM) ? "EPERM" : "EACCES");
} else {
status = PCAP_ERROR;
pcapint_fmt_errmsg_for_errno(errbuf,
PCAP_ERRBUF_SIZE, errno,
"Attempt to open %s failed",
dname2);
}
}
return (status);
}
/* XXX Assume unit zero */
*ppa = 0;
}
#endif
return (fd);
}
static int
pcap_activate_dlpi(pcap_t *p)
{
#ifdef DL_HP_RAWDLS
struct pcap_dlpi *pd = p->priv;
#endif
int status = 0;
int retv;
u_int ppa;
#ifdef HAVE_SOLARIS
int isatm = 0;
#endif
register dl_info_ack_t *infop;
#ifdef HAVE_SYS_BUFMOD_H
bpf_u_int32 ss;
#ifdef HAVE_SOLARIS
char release[GET_RELEASE_BUFSIZE];
bpf_u_int32 osmajor, osminor, osmicro;
#endif
#endif
bpf_u_int32 buf[MAXDLBUF];
p->fd = open_dlpi_device(p->opt.device, &ppa, p->errbuf);
if (p->fd < 0) {
status = p->fd;
goto bad;
}
#ifdef DL_HP_RAWDLS
/*
* XXX - HP-UX 10.20 and 11.xx don't appear to support sending and
* receiving packets on the same descriptor - you need separate
* descriptors for sending and receiving, bound to different SAPs.
*
* If the open fails, we just leave -1 in "pd->send_fd" and reject
* attempts to send packets, just as if, in pcap-bpf.c, we fail
* to open the BPF device for reading and writing, we just try
* to open it for reading only and, if that succeeds, just let
* the send attempts fail.
*/
pd->send_fd = open("/dev/dlpi", O_RDWR);
#endif
/*
** Attach if "style 2" provider
*/
if (dlinforeq(p->fd, p->errbuf) < 0 ||
dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) {
status = PCAP_ERROR;
goto bad;
}
infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
#ifdef HAVE_SOLARIS
if (infop->dl_mac_type == DL_IPATM)
isatm = 1;
#endif
if (infop->dl_provider_style == DL_STYLE2) {
retv = dl_doattach(p->fd, ppa, p->errbuf);
if (retv < 0) {
status = retv;
goto bad;
}
#ifdef DL_HP_RAWDLS
if (pd->send_fd >= 0) {
retv = dl_doattach(pd->send_fd, ppa, p->errbuf);
if (retv < 0) {
status = retv;
goto bad;
}
}
#endif
}
if (p->opt.rfmon) {
/*
* This device exists, but we don't support monitor mode
* any platforms that support DLPI.
*/
status = PCAP_ERROR_RFMON_NOTSUP;
goto bad;
}
#ifdef HAVE_DL_PASSIVE_REQ_T
/*
* Enable Passive mode to be able to capture on aggregated link.
* Not supported in all Solaris versions.
*/
dlpassive(p->fd, p->errbuf);
#endif
/*
** Bind (defer if using HP-UX 9 or HP-UX 10.20 or later, totally
** skip if using SINIX)
*/
#if !defined(HAVE_HPUX9) && !defined(HAVE_HPUX10_20_OR_LATER) && !defined(sinix)
#ifdef _AIX
/*
** AIX.
** According to IBM's AIX Support Line, the dl_sap value
** should not be less than 0x600 (1536) for standard Ethernet.
** However, we seem to get DL_BADADDR - "DLSAP addr in improper
** format or invalid" - errors if we use 1537 on the "tr0"
** device, which, given that its name starts with "tr" and that
** it's IBM, probably means a Token Ring device. (Perhaps we
** need to use 1537 on "/dev/dlpi/en" because that device is for
** D/I/X Ethernet, the "SAP" is actually an Ethernet type, and
** it rejects invalid Ethernet types.)
**
** So if 1537 fails, we try 2, as Hyung Sik Yoon of IBM Korea
** says that works on Token Ring (he says that 0 does *not*
** work; perhaps that's considered an invalid LLC SAP value - I
** assume the SAP value in a DLPI bind is an LLC SAP for network
** types that use 802.2 LLC).
*/
if ((dlbindreq(p->fd, 1537, p->errbuf) < 0 &&
dlbindreq(p->fd, 2, p->errbuf) < 0) ||
dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) {
status = PCAP_ERROR;
goto bad;
}
#elif defined(DL_HP_RAWDLS)
/*
** HP-UX 10.0x and 10.1x.
*/
if (dl_dohpuxbind(p->fd, p->errbuf) < 0) {
status = PCAP_ERROR;
goto bad;
}
if (pd->send_fd >= 0) {
/*
** XXX - if this fails, just close send_fd and
** set it to -1, so that you can't send but can
** still receive?
*/
if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) {
status = PCAP_ERROR;
goto bad;
}
}
#else /* neither AIX nor HP-UX */
/*
** Not Sinix, and neither AIX nor HP-UX - Solaris, and any other
** OS using DLPI.
**/
if (dlbindreq(p->fd, 0, p->errbuf) < 0 ||
dlbindack(p->fd, (char *)buf, p->errbuf, NULL) < 0) {
status = PCAP_ERROR;
goto bad;
}
#endif /* AIX vs. HP-UX vs. other */
#endif /* !HP-UX 9 and !HP-UX 10.20 or later and !SINIX */
/*
* Turn a negative snapshot value (invalid), a snapshot value of
* 0 (unspecified), or a value bigger than the normal maximum
* value, into the maximum allowed value.
*
* If some application really *needs* a bigger snapshot
* length, we should just increase MAXIMUM_SNAPLEN.
*/
if (p->snapshot <= 0 || p->snapshot > MAXIMUM_SNAPLEN)
p->snapshot = MAXIMUM_SNAPLEN;
#ifdef HAVE_SOLARIS
if (isatm) {
/*
** Have to turn on some special ATM promiscuous mode
** for SunATM.
** Do *NOT* turn regular promiscuous mode on; it doesn't
** help, and may break things.
*/
if (strioctl(p->fd, A_PROMISCON_REQ, 0, NULL) < 0) {
status = PCAP_ERROR;
pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "A_PROMISCON_REQ");
goto bad;
}
} else
#endif
if (p->opt.promisc) {
/*
** Enable promiscuous (not necessary on send FD)
*/
retv = dlpromiscon(p, DL_PROMISC_PHYS);
if (retv < 0) {
if (retv == PCAP_ERROR_PERM_DENIED)
status = PCAP_ERROR_PROMISC_PERM_DENIED;
else
status = retv;
goto bad;
}
/*
** Try to enable multicast (you would have thought
** promiscuous would be sufficient). (Skip if using
** HP-UX or SINIX) (Not necessary on send FD)
*/
#if !defined(__hpux) && !defined(sinix)
retv = dlpromiscon(p, DL_PROMISC_MULTI);
if (retv < 0)
status = PCAP_WARNING;
#endif
}
/*
** Try to enable SAP promiscuity (when not in promiscuous mode
** when using HP-UX, when not doing SunATM on Solaris, and never
** under SINIX) (Not necessary on send FD)
*/
#ifndef sinix
#if defined(__hpux)
/* HP-UX - only do this when not in promiscuous mode */
if (!p->opt.promisc) {
#elif defined(HAVE_SOLARIS)
/* Solaris - don't do this on SunATM devices */
if (!isatm) {
#else
/* Everything else (except for SINIX) - always do this */
{
#endif
retv = dlpromiscon(p, DL_PROMISC_SAP);
if (retv < 0) {
if (p->opt.promisc) {
/*
* Not fatal, since the DL_PROMISC_PHYS mode
* worked.
*
* Report it as a warning, however.
*/
status = PCAP_WARNING;
} else {
/*
* Fatal.
*/
status = retv;
goto bad;
}
}
}
#endif /* sinix */
/*
** HP-UX 9, and HP-UX 10.20 or later, must bind after setting
** promiscuous options.
*/
#if defined(HAVE_HPUX9) || defined(HAVE_HPUX10_20_OR_LATER)
if (dl_dohpuxbind(p->fd, p->errbuf) < 0) {
status = PCAP_ERROR;
goto bad;
}
/*
** We don't set promiscuous mode on the send FD, but we'll defer
** binding it anyway, just to keep the HP-UX 9/10.20 or later
** code together.
*/
if (pd->send_fd >= 0) {
/*
** XXX - if this fails, just close send_fd and
** set it to -1, so that you can't send but can
** still receive?
*/
if (dl_dohpuxbind(pd->send_fd, p->errbuf) < 0) {
status = PCAP_ERROR;
goto bad;
}
}
#endif
/*
** Determine link type
** XXX - get SAP length and address length as well, for use
** when sending packets.
*/
if (dlinforeq(p->fd, p->errbuf) < 0 ||
dlinfoack(p->fd, (char *)buf, p->errbuf) < 0) {
status = PCAP_ERROR;
goto bad;
}
infop = &(MAKE_DL_PRIMITIVES(buf))->info_ack;
if (pcap_process_mactype(p, infop->dl_mac_type) != 0) {
status = PCAP_ERROR;
goto bad;
}
#ifdef DLIOCRAW
/*
** This is a non standard SunOS hack to get the full raw link-layer
** header.
*/
if (strioctl(p->fd, DLIOCRAW, 0, NULL) < 0) {
status = PCAP_ERROR;
pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "DLIOCRAW");
goto bad;
}
#endif
#ifdef HAVE_SYS_BUFMOD_H
ss = p->snapshot;
/*
** There is a bug in bufmod(7). When dealing with messages of
** less than snaplen size it strips data from the beginning not
** the end.
**
** This bug is fixed in 5.3.2. Also, there is a patch available.
** Ask for bugid 1149065.
*/
#ifdef HAVE_SOLARIS
get_release(release, sizeof (release), &osmajor, &osminor, &osmicro);
if (osmajor == 5 && (osminor <= 2 || (osminor == 3 && osmicro < 2)) &&
getenv("BUFMOD_FIXED") == NULL) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"WARNING: bufmod is broken in SunOS %s; ignoring snaplen.",
release);
ss = 0;
status = PCAP_WARNING;
}
#endif
/* Push and configure bufmod. */
if (pcap_conf_bufmod(p, ss) != 0) {
status = PCAP_ERROR;
goto bad;
}
#endif
/*
** As the last operation flush the read side.
*/
if (ioctl(p->fd, I_FLUSH, FLUSHR) != 0) {
status = PCAP_ERROR;
pcapint_fmt_errmsg_for_errno(p->errbuf, PCAP_ERRBUF_SIZE,
errno, "FLUSHR");
goto bad;
}
/* Allocate data buffer. */
if (pcap_alloc_databuf(p) != 0) {
status = PCAP_ERROR;
goto bad;
}
/*
* Success.
*
* "p->fd" is an FD for a STREAMS device, so "select()" and
* "poll()" should work on it.
*/
p->selectable_fd = p->fd;
p->read_op = pcap_read_dlpi;
p->inject_op = pcap_inject_dlpi;
p->setfilter_op = pcapint_install_bpf_program; /* no kernel filtering */
p->setdirection_op = NULL; /* Not implemented.*/
p->set_datalink_op = NULL; /* can't change data link type */
p->getnonblock_op = pcapint_getnonblock_fd;
p->setnonblock_op = pcapint_setnonblock_fd;
p->stats_op = pcap_stats_dlpi;
p->cleanup_op = pcap_cleanup_dlpi;
return (status);
bad:
pcap_cleanup_dlpi(p);
return (status);
}
/*
* Split a device name into a device type name and a unit number;
* return the a pointer to the beginning of the unit number, which
* is the end of the device type name, and set "*unitp" to the unit
* number.
*
* Returns NULL on error, and fills "ebuf" with an error message.
*/
static char *
split_dname(char *device, u_int *unitp, char *ebuf)
{
char *cp;
char *eos;
long unit;
/*
* Look for a number at the end of the device name string.
*/
cp = device + strlen(device) - 1;
if (*cp < '0' || *cp > '9') {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s missing unit number",
device);
return (NULL);
}
/* Digits at end of string are unit number */
while (cp-1 >= device && *(cp-1) >= '0' && *(cp-1) <= '9')
cp--;
errno = 0;
unit = strtol(cp, &eos, 10);
if (*eos != '\0') {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s bad unit number", device);
return (NULL);
}
if (errno == ERANGE || unit > INT_MAX) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number too large",
device);
return (NULL);
}
if (unit < 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "%s unit number is negative",
device);
return (NULL);
}
*unitp = (u_int)unit;
return (cp);
}
static int
dl_doattach(int fd, int ppa, char *ebuf)
{
dl_attach_req_t req;
bpf_u_int32 buf[MAXDLBUF];
int err;
req.dl_primitive = DL_ATTACH_REQ;
req.dl_ppa = ppa;
if (send_request(fd, (char *)&req, sizeof(req), "attach", ebuf) < 0)
return (PCAP_ERROR);
err = dlokack(fd, "attach", (char *)buf, ebuf, NULL);
if (err < 0)
return (err);
return (0);
}
#ifdef DL_HP_RAWDLS
static int
dl_dohpuxbind(int fd, char *ebuf)
{
int hpsap;
int uerror;
bpf_u_int32 buf[MAXDLBUF];
/*
* XXX - we start at 22 because we used to use only 22, but
* that was just because that was the value used in some
* sample code from HP. With what value *should* we start?
* Does it matter, given that we're enabling SAP promiscuity
* on the input FD?
*/
hpsap = 22;
for (;;) {
if (dlbindreq(fd, hpsap, ebuf) < 0)
return (-1);
if (dlbindack(fd, (char *)buf, ebuf, &uerror) >= 0)
break;
/*
* For any error other than a UNIX EBUSY, give up.
*/
if (uerror != EBUSY) {
/*
* dlbindack() has already filled in ebuf for
* this error.
*/
return (-1);
}
/*
* For EBUSY, try the next SAP value; that means that
* somebody else is using that SAP. Clear ebuf so
* that application doesn't report the "Device busy"
* error as a warning.
*/
*ebuf = '\0';
hpsap++;
if (hpsap > 100) {
pcapint_strlcpy(ebuf,
"All SAPs from 22 through 100 are in use",
PCAP_ERRBUF_SIZE);
return (-1);
}
}
return (0);
}
#endif
#define STRINGIFY(n) #n
static int
dlpromiscon(pcap_t *p, bpf_u_int32 level)
{
dl_promiscon_req_t req;
bpf_u_int32 buf[MAXDLBUF];
int err;
int uerror;
req.dl_primitive = DL_PROMISCON_REQ;
req.dl_level = level;
if (send_request(p->fd, (char *)&req, sizeof(req), "promiscon",
p->errbuf) < 0)
return (PCAP_ERROR);
err = dlokack(p->fd, "promiscon" STRINGIFY(level), (char *)buf,
p->errbuf, &uerror);
if (err < 0) {
if (err == PCAP_ERROR_PERM_DENIED) {
snprintf(p->errbuf, PCAP_ERRBUF_SIZE,
"Attempt to set promiscuous mode failed with %s - root privilege may be required",
(uerror == EPERM) ? "EPERM" : "EACCES");
err = PCAP_ERROR_PROMISC_PERM_DENIED;
}
return (err);
}
return (0);
}
/*
* Not all interfaces are DLPI interfaces, and thus not all interfaces
* can be opened with DLPI (for example, the loopback interface is not
* a DLPI interface on Solaris prior to Solaris 11), so try to open
* the specified interface; return 0 if we fail with PCAP_ERROR_NO_SUCH_DEVICE
* and 1 otherwise.
*/
static int
is_dlpi_interface(const char *name)
{
int fd;
u_int ppa;
char errbuf[PCAP_ERRBUF_SIZE];
fd = open_dlpi_device(name, &ppa, errbuf);
if (fd < 0) {
/*
* Error - was it PCAP_ERROR_NO_SUCH_DEVICE?
*/
if (fd == PCAP_ERROR_NO_SUCH_DEVICE) {
/*
* Yes, so we can't open this because it's
* not a DLPI interface.
*/
return (0);
}
/*
* No, so, in the case where there's a single DLPI
* device for all interfaces of this type ("style
* 2" providers?), we don't know whether it's a DLPI
* interface or not, as we didn't try an attach.
* Say it is a DLPI device, so that the user can at
* least try to open it and report the error (which
* is probably "you don't have permission to open that
* DLPI device"; reporting those interfaces means
* users will ask "why am I getting a permissions error
* when I try to capture" rather than "why am I not
* seeing any interfaces", making the underlying problem
* clearer).
*/
return (1);
}
/*
* Success.
*/
close(fd);
return (1);
}
static int
get_if_flags(const char *name _U_, bpf_u_int32 *flags _U_, char *errbuf _U_)
{
/*
* Nothing we can do other than mark loopback devices as "the
* connected/disconnected status doesn't apply".
*
* XXX - on Solaris, can we do what the dladm command does,
* i.e. get a connected/disconnected indication from a kstat?
* (Note that you can also get the link speed, and possibly
* other information, from a kstat as well.)
*/
if (*flags & PCAP_IF_LOOPBACK) {
/*
* Loopback devices aren't wireless, and "connected"/
* "disconnected" doesn't apply to them.
*/
*flags |= PCAP_IF_CONNECTION_STATUS_NOT_APPLICABLE;
return (0);
}
return (0);
}
int
pcapint_platform_finddevs(pcap_if_list_t *devlistp, char *errbuf)
{
#ifdef HAVE_SOLARIS
int fd;
union {
u_int nunits;
char pad[516]; /* XXX - must be at least 513; is 516
in "atmgetunits" */
} buf;
char baname[2+1+1];
u_int i;
#endif
/*
* Get the list of regular interfaces first.
*/
if (pcapint_findalldevs_interfaces(devlistp, errbuf, is_dlpi_interface,
get_if_flags) == -1)
return (-1); /* failure */
#ifdef HAVE_SOLARIS
/*
* We may have to do special magic to get ATM devices.
*/
if ((fd = open("/dev/ba", O_RDWR)) < 0) {
/*
* We couldn't open the "ba" device.
* For now, just give up; perhaps we should
* return an error if the problem is neither
* a "that device doesn't exist" error (ENOENT,
* ENXIO, etc.) or a "you're not allowed to do
* that" error (EPERM, EACCES).
*/
return (0);
}
if (strioctl(fd, A_GET_UNITS, sizeof(buf), (char *)&buf) < 0) {
pcapint_fmt_errmsg_for_errno(errbuf, PCAP_ERRBUF_SIZE,
errno, "A_GET_UNITS");
return (-1);
}
for (i = 0; i < buf.nunits; i++) {
snprintf(baname, sizeof baname, "ba%u", i);
/*
* XXX - is there a notion of "up" and "running"?
* And is there a way to determine whether the
* interface is plugged into a network?
*/
if (pcapint_add_dev(devlistp, baname, 0, NULL, errbuf) == NULL)
return (-1);
}
#endif
return (0);
}
static int
send_request(int fd, char *ptr, int len, char *what, char *ebuf)
{
struct strbuf ctl;
int flags;
ctl.maxlen = 0;
ctl.len = len;
ctl.buf = ptr;
flags = 0;
if (putmsg(fd, &ctl, (struct strbuf *) NULL, flags) < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "send_request: putmsg \"%s\"", what);
return (-1);
}
return (0);
}
static int
recv_ack(int fd, int size, const char *what, char *bufp, char *ebuf, int *uerror)
{
union DL_primitives *dlp;
struct strbuf ctl;
int flags;
char errmsgbuf[PCAP_ERRBUF_SIZE];
char dlprimbuf[64];
/*
* Clear out "*uerror", so it's only set for DL_ERROR_ACK/DL_SYSERR,
* making that the only place where EBUSY is treated specially.
*/
if (uerror != NULL)
*uerror = 0;
ctl.maxlen = MAXDLBUF;
ctl.len = 0;
ctl.buf = bufp;
flags = 0;
if (getmsg(fd, &ctl, (struct strbuf*)NULL, &flags) < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "recv_ack: %s getmsg", what);
return (PCAP_ERROR);
}
dlp = MAKE_DL_PRIMITIVES(ctl.buf);
switch (dlp->dl_primitive) {
case DL_INFO_ACK:
case DL_BIND_ACK:
case DL_OK_ACK:
#ifdef DL_HP_PPA_ACK
case DL_HP_PPA_ACK:
#endif
/* These are OK */
break;
case DL_ERROR_ACK:
switch (dlp->error_ack.dl_errno) {
case DL_SYSERR:
if (uerror != NULL)
*uerror = dlp->error_ack.dl_unix_errno;
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
dlp->error_ack.dl_unix_errno,
"recv_ack: %s: UNIX error", what);
if (dlp->error_ack.dl_unix_errno == EPERM ||
dlp->error_ack.dl_unix_errno == EACCES)
return (PCAP_ERROR_PERM_DENIED);
break;
default:
/*
* Neither EPERM nor EACCES.
*/
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"recv_ack: %s: %s", what,
dlstrerror(errmsgbuf, sizeof (errmsgbuf), dlp->error_ack.dl_errno));
if (dlp->error_ack.dl_errno == DL_BADPPA)
return (PCAP_ERROR_NO_SUCH_DEVICE);
else if (dlp->error_ack.dl_errno == DL_ACCESS)
return (PCAP_ERROR_PERM_DENIED);
break;
}
return (PCAP_ERROR);
default:
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"recv_ack: %s: Unexpected primitive ack %s",
what, dlprim(dlprimbuf, sizeof (dlprimbuf), dlp->dl_primitive));
return (PCAP_ERROR);
}
if (ctl.len < size) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"recv_ack: %s: Ack too small (%d < %d)",
what, ctl.len, size);
return (PCAP_ERROR);
}
return (ctl.len);
}
static char *
dlstrerror(char *errbuf, size_t errbufsize, bpf_u_int32 dl_errno)
{
switch (dl_errno) {
case DL_ACCESS:
return ("Improper permissions for request");
case DL_BADADDR:
return ("DLSAP addr in improper format or invalid");
case DL_BADCORR:
return ("Seq number not from outstand DL_CONN_IND");
case DL_BADDATA:
return ("User data exceeded provider limit");
case DL_BADPPA:
#ifdef HAVE_DEV_DLPI
/*
* With a single "/dev/dlpi" device used for all
* DLPI providers, PPAs have nothing to do with
* unit numbers.
*/
return ("Specified PPA was invalid");
#else
/*
* We have separate devices for separate devices;
* the PPA is just the unit number.
*/
return ("Specified PPA (device unit) was invalid");
#endif
case DL_BADPRIM:
return ("Primitive received not known by provider");
case DL_BADQOSPARAM:
return ("QOS parameters contained invalid values");
case DL_BADQOSTYPE:
return ("QOS structure type is unknown/unsupported");
case DL_BADSAP:
return ("Bad LSAP selector");
case DL_BADTOKEN:
return ("Token used not an active stream");
case DL_BOUND:
return ("Attempted second bind with dl_max_conind");
case DL_INITFAILED:
return ("Physical link initialization failed");
case DL_NOADDR:
return ("Provider couldn't allocate alternate address");
case DL_NOTINIT:
return ("Physical link not initialized");
case DL_OUTSTATE:
return ("Primitive issued in improper state");
case DL_SYSERR:
return ("UNIX system error occurred");
case DL_UNSUPPORTED:
return ("Requested service not supplied by provider");
case DL_UNDELIVERABLE:
return ("Previous data unit could not be delivered");
case DL_NOTSUPPORTED:
return ("Primitive is known but not supported");
case DL_TOOMANY:
return ("Limit exceeded");
case DL_NOTENAB:
return ("Promiscuous mode not enabled");
case DL_BUSY:
return ("Other streams for PPA in post-attached");
case DL_NOAUTO:
return ("Automatic handling XID&TEST not supported");
case DL_NOXIDAUTO:
return ("Automatic handling of XID not supported");
case DL_NOTESTAUTO:
return ("Automatic handling of TEST not supported");
case DL_XIDAUTO:
return ("Automatic handling of XID response");
case DL_TESTAUTO:
return ("Automatic handling of TEST response");
case DL_PENDING:
return ("Pending outstanding connect indications");
default:
snprintf(errbuf, errbufsize, "Error %02x", dl_errno);
return (errbuf);
}
}
static char *
dlprim(char *primbuf, size_t primbufsize, bpf_u_int32 prim)
{
switch (prim) {
case DL_INFO_REQ:
return ("DL_INFO_REQ");
case DL_INFO_ACK:
return ("DL_INFO_ACK");
case DL_ATTACH_REQ:
return ("DL_ATTACH_REQ");
case DL_DETACH_REQ:
return ("DL_DETACH_REQ");
case DL_BIND_REQ:
return ("DL_BIND_REQ");
case DL_BIND_ACK:
return ("DL_BIND_ACK");
case DL_UNBIND_REQ:
return ("DL_UNBIND_REQ");
case DL_OK_ACK:
return ("DL_OK_ACK");
case DL_ERROR_ACK:
return ("DL_ERROR_ACK");
case DL_SUBS_BIND_REQ:
return ("DL_SUBS_BIND_REQ");
case DL_SUBS_BIND_ACK:
return ("DL_SUBS_BIND_ACK");
case DL_UNITDATA_REQ:
return ("DL_UNITDATA_REQ");
case DL_UNITDATA_IND:
return ("DL_UNITDATA_IND");
case DL_UDERROR_IND:
return ("DL_UDERROR_IND");
case DL_UDQOS_REQ:
return ("DL_UDQOS_REQ");
case DL_CONNECT_REQ:
return ("DL_CONNECT_REQ");
case DL_CONNECT_IND:
return ("DL_CONNECT_IND");
case DL_CONNECT_RES:
return ("DL_CONNECT_RES");
case DL_CONNECT_CON:
return ("DL_CONNECT_CON");
case DL_TOKEN_REQ:
return ("DL_TOKEN_REQ");
case DL_TOKEN_ACK:
return ("DL_TOKEN_ACK");
case DL_DISCONNECT_REQ:
return ("DL_DISCONNECT_REQ");
case DL_DISCONNECT_IND:
return ("DL_DISCONNECT_IND");
case DL_RESET_REQ:
return ("DL_RESET_REQ");
case DL_RESET_IND:
return ("DL_RESET_IND");
case DL_RESET_RES:
return ("DL_RESET_RES");
case DL_RESET_CON:
return ("DL_RESET_CON");
default:
snprintf(primbuf, primbufsize, "unknown primitive 0x%x",
prim);
return (primbuf);
}
}
static int
dlbindreq(int fd, bpf_u_int32 sap, char *ebuf)
{
dl_bind_req_t req;
memset((char *)&req, 0, sizeof(req));
req.dl_primitive = DL_BIND_REQ;
/* XXX - what if neither of these are defined? */
#if defined(DL_HP_RAWDLS)
req.dl_max_conind = 1; /* XXX magic number */
req.dl_service_mode = DL_HP_RAWDLS;
#elif defined(DL_CLDLS)
req.dl_service_mode = DL_CLDLS;
#endif
req.dl_sap = sap;
return (send_request(fd, (char *)&req, sizeof(req), "bind", ebuf));
}
static int
dlbindack(int fd, char *bufp, char *ebuf, int *uerror)
{
return (recv_ack(fd, DL_BIND_ACK_SIZE, "bind", bufp, ebuf, uerror));
}
static int
dlokack(int fd, const char *what, char *bufp, char *ebuf, int *uerror)
{
return (recv_ack(fd, DL_OK_ACK_SIZE, what, bufp, ebuf, uerror));
}
static int
dlinforeq(int fd, char *ebuf)
{
dl_info_req_t req;
req.dl_primitive = DL_INFO_REQ;
return (send_request(fd, (char *)&req, sizeof(req), "info", ebuf));
}
static int
dlinfoack(int fd, char *bufp, char *ebuf)
{
return (recv_ack(fd, DL_INFO_ACK_SIZE, "info", bufp, ebuf, NULL));
}
#ifdef HAVE_DL_PASSIVE_REQ_T
/*
* Enable DLPI passive mode. We do not care if this request fails, as this
* indicates the underlying DLPI device does not support link aggregation.
*/
static void
dlpassive(int fd, char *ebuf)
{
dl_passive_req_t req;
bpf_u_int32 buf[MAXDLBUF];
req.dl_primitive = DL_PASSIVE_REQ;
if (send_request(fd, (char *)&req, sizeof(req), "dlpassive", ebuf) == 0)
(void) dlokack(fd, "dlpassive", (char *)buf, ebuf, NULL);
}
#endif
#ifdef DL_HP_RAWDLS
/*
* There's an ack *if* there's an error.
*/
static int
dlrawdatareq(int fd, const u_char *datap, int datalen)
{
struct strbuf ctl, data;
long buf[MAXDLBUF]; /* XXX - char? */
union DL_primitives *dlp;
int dlen;
dlp = MAKE_DL_PRIMITIVES(buf);
dlp->dl_primitive = DL_HP_RAWDATA_REQ;
dlen = DL_HP_RAWDATA_REQ_SIZE;
/*
* HP's documentation doesn't appear to show us supplying any
* address pointed to by the control part of the message.
* I think that's what raw mode means - you just send the raw
* packet, you don't specify where to send it to, as that's
* implied by the destination address.
*/
ctl.maxlen = 0;
ctl.len = dlen;
ctl.buf = (void *)buf;
data.maxlen = 0;
data.len = datalen;
data.buf = (void *)datap;
return (putmsg(fd, &ctl, &data, 0));
}
#endif /* DL_HP_RAWDLS */
#if defined(HAVE_SOLARIS) && defined(HAVE_SYS_BUFMOD_H)
static void
get_release(char *buf, size_t bufsize, bpf_u_int32 *majorp,
bpf_u_int32 *minorp, bpf_u_int32 *microp)
{
char *cp;
*majorp = 0;
*minorp = 0;
*microp = 0;
if (sysinfo(SI_RELEASE, buf, bufsize) < 0) {
pcapint_strlcpy(buf, "?", bufsize);
return;
}
cp = buf;
if (!PCAP_ISDIGIT((unsigned char)*cp))
return;
*majorp = strtol(cp, &cp, 10);
if (*cp++ != '.')
return;
*minorp = strtol(cp, &cp, 10);
if (*cp++ != '.')
return;
*microp = strtol(cp, &cp, 10);
}
#endif
#ifdef DL_HP_PPA_REQ
/*
* Under HP-UX 10 and HP-UX 11, we can ask for the ppa
*/
/*
* Determine ppa number that specifies ifname.
*
* If the "dl_hp_ppa_info_t" doesn't have a "dl_module_id_1" member,
* the code that's used here is the old code for HP-UX 10.x.
*
* However, HP-UX 10.20, at least, appears to have such a member
* in its "dl_hp_ppa_info_t" structure, so the new code is used.
* The new code didn't work on an old 10.20 system on which Rick
* Jones of HP tried it, but with later patches installed, it
* worked - it appears that the older system had those members but
* didn't put anything in them, so, if the search by name fails, we
* do the old search.
*
* Rick suggests that making sure your system is "up on the latest
* lancommon/DLPI/driver patches" is probably a good idea; it'd fix
* that problem, as well as allowing libpcap to see packets sent
* from the system on which the libpcap application is being run.
* (On 10.20, in addition to getting the latest patches, you need
* to turn the kernel "lanc_outbound_promisc_flag" flag on with ADB;
* a posting to "comp.sys.hp.hpux" at
*
*
http://www.deja.com/[ST_rn=ps]/getdoc.xp?AN=558092266
*
* says that, to see the machine's outgoing traffic, you'd need to
* apply the right patches to your system, and also set that variable
* with:
echo 'lanc_outbound_promisc_flag/W1' | /usr/bin/adb -w /stand/vmunix /dev/kmem
* which could be put in, for example, "/sbin/init.d/lan".
*
* Setting the variable is not necessary on HP-UX 11.x.
*/
static int
get_dlpi_ppa(register int fd, register const char *device, register u_int unit,
u_int *ppa, register char *ebuf)
{
register dl_hp_ppa_ack_t *ap;
register dl_hp_ppa_info_t *ipstart, *ip;
register u_int i;
char dname[100];
register u_long majdev;
struct stat statbuf;
dl_hp_ppa_req_t req;
char buf[MAXDLBUF];
char *ppa_data_buf;
dl_hp_ppa_ack_t *dlp;
struct strbuf ctl;
int flags;
memset((char *)&req, 0, sizeof(req));
req.dl_primitive = DL_HP_PPA_REQ;
memset((char *)buf, 0, sizeof(buf));
if (send_request(fd, (char *)&req, sizeof(req), "hpppa", ebuf) < 0)
return (PCAP_ERROR);
ctl.maxlen = DL_HP_PPA_ACK_SIZE;
ctl.len = 0;
ctl.buf = (char *)buf;
flags = 0;
/*
* DLPI may return a big chunk of data for a DL_HP_PPA_REQ. The normal
* recv_ack will fail because it set the maxlen to MAXDLBUF (8192)
* which is NOT big enough for a DL_HP_PPA_REQ.
*
* This causes libpcap applications to fail on a system with HP-APA
* installed.
*
* To figure out how big the returned data is, we first call getmsg
* to get the small head and peek at the head to get the actual data
* length, and then issue another getmsg to get the actual PPA data.
*/
/* get the head first */
if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "get_dlpi_ppa: hpppa getmsg");
return (PCAP_ERROR);
}
if (ctl.len == -1) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"get_dlpi_ppa: hpppa getmsg: control buffer has no data");
return (PCAP_ERROR);
}
dlp = (dl_hp_ppa_ack_t *)ctl.buf;
if (dlp->dl_primitive != DL_HP_PPA_ACK) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"get_dlpi_ppa: hpppa unexpected primitive ack 0x%x",
(bpf_u_int32)dlp->dl_primitive);
return (PCAP_ERROR);
}
if ((size_t)ctl.len < DL_HP_PPA_ACK_SIZE) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"get_dlpi_ppa: hpppa ack too small (%d < %lu)",
ctl.len, (unsigned long)DL_HP_PPA_ACK_SIZE);
return (PCAP_ERROR);
}
/* allocate buffer */
if ((ppa_data_buf = (char *)malloc(dlp->dl_length)) == NULL) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "get_dlpi_ppa: hpppa malloc");
return (PCAP_ERROR);
}
ctl.maxlen = dlp->dl_length;
ctl.len = 0;
ctl.buf = (char *)ppa_data_buf;
/* get the data */
if (getmsg(fd, &ctl, (struct strbuf *)NULL, &flags) < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "get_dlpi_ppa: hpppa getmsg");
free(ppa_data_buf);
return (PCAP_ERROR);
}
if (ctl.len == -1) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"get_dlpi_ppa: hpppa getmsg: control buffer has no data");
return (PCAP_ERROR);
}
if ((u_int)ctl.len < dlp->dl_length) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"get_dlpi_ppa: hpppa ack too small (%d < %lu)",
ctl.len, (unsigned long)dlp->dl_length);
free(ppa_data_buf);
return (PCAP_ERROR);
}
ap = (dl_hp_ppa_ack_t *)buf;
ipstart = (dl_hp_ppa_info_t *)ppa_data_buf;
ip = ipstart;
#ifdef HAVE_DL_HP_PPA_INFO_T_DL_MODULE_ID_1
/*
* The "dl_hp_ppa_info_t" structure has a "dl_module_id_1"
* member that should, in theory, contain the part of the
* name for the device that comes before the unit number,
* and should also have a "dl_module_id_2" member that may
* contain an alternate name (e.g., I think Ethernet devices
* have both "lan", for "lanN", and "snap", for "snapN", with
* the former being for Ethernet packets and the latter being
* for 802.3/802.2 packets).
*
* Search for the device that has the specified name and
* instance number.
*/
for (i = 0; i < ap->dl_count; i++) {
if ((strcmp((const char *)ip->dl_module_id_1, device) == 0 ||
strcmp((const char *)ip->dl_module_id_2, device) == 0) &&
ip->dl_instance_num == unit)
break;
ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
}
#else
/*
* We don't have that member, so the search is impossible; make it
* look as if the search failed.
*/
i = ap->dl_count;
#endif
if (i == ap->dl_count) {
/*
* Well, we didn't, or can't, find the device by name.
*
* HP-UX 10.20, whilst it has "dl_module_id_1" and
* "dl_module_id_2" fields in the "dl_hp_ppa_info_t",
* doesn't seem to fill them in unless the system is
* at a reasonably up-to-date patch level.
*
* Older HP-UX 10.x systems might not have those fields
* at all.
*
* Therefore, we'll search for the entry with the major
* device number of a device with the name "/dev/<dev><unit>",
* if such a device exists, as the old code did.
*/
snprintf(dname, sizeof(dname), "/dev/%s%u", device, unit);
if (stat(dname, &statbuf) < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "stat: %s", dname);
return (PCAP_ERROR);
}
majdev = major(statbuf.st_rdev);
ip = ipstart;
for (i = 0; i < ap->dl_count; i++) {
if (ip->dl_mjr_num == majdev &&
ip->dl_instance_num == unit)
break;
ip = (dl_hp_ppa_info_t *)((u_char *)ipstart + ip->dl_next_offset);
}
}
if (i == ap->dl_count) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"can't find /dev/dlpi PPA for %s%u", device, unit);
return (PCAP_ERROR_NO_SUCH_DEVICE);
}
if (ip->dl_hdw_state == HDW_DEAD) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"%s%d: hardware state: DOWN\n", device, unit);
free(ppa_data_buf);
return (PCAP_ERROR);
}
*ppa = ip->dl_ppa;
free(ppa_data_buf);
return (0);
}
#endif
#ifdef HAVE_HPUX9
/*
* Under HP-UX 9, there is no good way to determine the ppa.
* So punt and read it from /dev/kmem.
*/
static struct nlist nl[] = {
#define NL_IFNET 0
{ "ifnet" },
{ "" }
};
static char path_vmunix[] = "/hp-ux";
/* Determine ppa number that specifies ifname */
static int
get_dlpi_ppa(register int fd, register const char *ifname, register u_int unit,
u_int *ppa, register char *ebuf)
{
register const char *cp;
register int kd;
void *addr;
struct ifnet ifnet;
char if_name[sizeof(ifnet.if_name) + 1];
cp = strrchr(ifname, '/');
if (cp != NULL)
ifname = cp + 1;
if (nlist(path_vmunix, &nl) < 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "nlist %s failed",
path_vmunix);
return (PCAP_ERROR);
}
if (nl[NL_IFNET].n_value == 0) {
snprintf(ebuf, PCAP_ERRBUF_SIZE,
"couldn't find %s kernel symbol",
nl[NL_IFNET].n_name);
return (PCAP_ERROR);
}
kd = open("/dev/kmem", O_RDONLY);
if (kd < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "kmem open");
return (PCAP_ERROR);
}
if (dlpi_kread(kd, nl[NL_IFNET].n_value,
&addr, sizeof(addr), ebuf) < 0) {
close(kd);
return (PCAP_ERROR);
}
for (; addr != NULL; addr = ifnet.if_next) {
if (dlpi_kread(kd, (off_t)addr,
&ifnet, sizeof(ifnet), ebuf) < 0 ||
dlpi_kread(kd, (off_t)ifnet.if_name,
if_name, sizeof(ifnet.if_name), ebuf) < 0) {
(void)close(kd);
return (PCAP_ERROR);
}
if_name[sizeof(ifnet.if_name)] = '\0';
if (strcmp(if_name, ifname) == 0 && ifnet.if_unit == unit) {
*ppa = ifnet.if_index;
return (0);
}
}
snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't find %s", ifname);
return (PCAP_ERROR_NO_SUCH_DEVICE);
}
static int
dlpi_kread(register int fd, register off_t addr,
register void *buf, register u_int len, register char *ebuf)
{
register int cc;
if (lseek(fd, addr, SEEK_SET) < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "lseek");
return (-1);
}
cc = read(fd, buf, len);
if (cc < 0) {
pcapint_fmt_errmsg_for_errno(ebuf, PCAP_ERRBUF_SIZE,
errno, "read");
return (-1);
} else if (cc != len) {
snprintf(ebuf, PCAP_ERRBUF_SIZE, "short read (%d != %d)", cc,
len);
return (-1);
}
return (cc);
}
#endif
pcap_t *
pcapint_create_interface(const char *device _U_, char *ebuf)
{
pcap_t *p;
#ifdef DL_HP_RAWDLS
struct pcap_dlpi *pd;
#endif
p = PCAP_CREATE_COMMON(ebuf, struct pcap_dlpi);
if (p == NULL)
return (NULL);
#ifdef DL_HP_RAWDLS
pd = p->priv;
pd->send_fd = -1; /* it hasn't been opened yet */
#endif
p->activate_op = pcap_activate_dlpi;
return (p);
}
/*
* Libpcap version string.
*/
const char *
pcap_lib_version(void)
{
return (PCAP_VERSION_STRING);
}
